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From: | Jason Wang |
Subject: | Re: [PATCH v2 1/2] vdpa: Skip the maps not in the iova tree |
Date: | Fri, 5 Aug 2022 10:28:53 +0800 |
User-agent: | Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.12.0 |
在 2022/8/4 23:54, Eugenio Pérez 写道:
Next patch will skip the registering of dma maps that the vdpa device rejects in the iova tree. We need to consider that here or we cause a SIGSEGV accessing result. Reported-by: Lei Yang <leiyang@redhat.com> Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
--- hw/virtio/vhost-vdpa.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index 3ff9ce3501..983d3697b0 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -289,6 +289,10 @@ static void vhost_vdpa_listener_region_del(MemoryListener *listener, };result = vhost_iova_tree_find_iova(v->iova_tree, &mem_region);+ if (!result) { + /* The memory listener map wasn't mapped */ + return; + } iova = result->iova; vhost_iova_tree_remove(v->iova_tree, result); }
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